CIAT COADIS LINE 900 Manuel D'instructions page 30

The ducts used may be coated with an anti-condensation material. (Fibreglass
12-25 mm thick)
- Remove the plug from the fresh air inlet.
- Position the duct on the connection sleeve.
- Place a retaining clamp around the duct in contact with the connection sleeve.
- Tighten the clamp and check the integrity of the connection.
4.3. Hydraulic connections
Water always flows into the bottom of the coil and exits at the top.
The pipes are positioned in the suspended ceiling as shown in Fig. 7.
The coils are equipped with a header coupling with flat face swivel nuts with a female
The header coupling is equipped with an air bleed valve (Fig. 8 - a) at the high point
with partial draining at the low points (Fig. 8 - b) that can be manoeuvred using a
7 mm Allen key or a flat-blade screwdriver.
Before carrying out work on the unit, check that the power supply is cut off and locked.
Only experienced, qualified technicians may perform installation and maintenance work
The technician must take all the necessary precautions to recover the water drained
during venting or draining procedures.
He must pay particular attention to the risks of overflowing and splashes.
loosen the drain screw (Fig.8, rep. a) by a maximum of 3 turns.
ensure the unit is hydraulically isolated from the network and
loosen the drain screw (Fig.8, rep. b) by a maximum of 3 turns.
The coil can be partially drained, however precautions must be taken during winter
if the installation is shut down. To drain completely, air must be blown through the
circuit.
If the hydraulic connections are completed, it is not necessary to insulate the valves
to prevent condensation (unless they are specific valves). A naturally inclined ABS
auxiliary condensate drain pan is supplied with the unit. This recovers condensate
from the valves and coil (from the main pan) and drains it via gravity or using a
condensate drain pump supplied as an option.
Installation
To avoid damaging the CIAT valves or couplings, never torque tighten to more
than 3.5 daN.m. Use two wrenches, one to hold and the other to tighten to ensure
a tight seal.
Always fit the valve in the right direction. On the 2 CIAT couplings, the direction of flow
The maximum allowable differential pressure for our valves (open or closed) is
100 kPa. We recommend not exceeding 60 kPa.
N 12.59C